Strange motor noise with 3.6.0-beta.2

balajiramani

I updated to 3.6.0-beta.2 and I noticed that there were some strange motor noise during printing. I also noticed that there were some layer shifts some times. I am attaching a video that shows the noise. I later lowered the acceleration for both X and Y from 4000 to 1000 and the noise went away. I went back to 3.6.0-beta.1 and noticed that there were no issues and the printer is able to handle the acceleration value of 4000.

The printer I have is a delta (not sure if this is something specific to a delta).

Here is the gcode that triggered the issue

22-334StringStar2L2N4open_0.2mm_PLA_BigDelta_12m.gcode

Here is the video that shows the motor noise - https://photos.app.goo.gl/dX5uqjCsf5SBth4Y9

droftarts

@balajiramani It's difficult to know what noise is 'strange', or where it's coming from. Is it the 'hissing' noise? Is it coming from the delta tower motors, or the extruder? What Duet board are you using? Are you using input shaping? Please post your config.g and response to M122.

Ian

oliof

Also, what release did you do the update from? There was a time when RRFdefaulted to stealth chop; spreadcycle is the new default

droftarts

@oliof he did say it was between 3.6.0-beta1 and 3.6.0-beta2.

Ian

balajiramani

@droftarts The hissing sound is from the fans. The noise that I am referring to can be heard at 7 and 19 seconds in the video. It is from the delta tower motors. I am using a Duet Wifi 2 board. Input shaping is turned on. Here is the config.g file. Here is the output of M122 when the issue arises:

M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.6.0-beta.2 (2024-11-12 08:12:30) running on Duet WiFi 1.0 or 1.01
Board ID: 08DAM-999TL-MQ4SD-6JTDL-3SS6N-968BX
Used output buffers: 3 of 26 (19 max)
=== RTOS ===
Static ram: 23536
Dynamic ram: 67308 of which 12 recycled
Never used RAM 9316, free system stack 122 words
Tasks: NETWORK(1,ready,23.3%,195) HEAT(3,nWait 5,0.1%,328) Move(4,nWait 5,7.4%,264) MAIN(1,running,69.2%,742) IDLE(0,ready,0.0%,29), total 100.0%
Owned mutexes:
=== Platform ===
Last reset 00:08:48 ago, cause: software
Last software reset at 2024-12-08 19:04, reason: User, Gcodes spinning, available RAM 12172, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
MCU temperature: min 35.8, current 36.0, max 36.5
Supply voltage: min 23.6, current 24.2, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/2, heap memory allocated/used/recyclable 2048/1140/1072, gc cycles 1
Events: 0 queued, 0 completed
Date/time: 2024-12-11 20:25:22
Slowest loop: 16.23ms; fastest: 0.14ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 8
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 0.9ms, write time 0.0ms, max retries 0
=== Move ===
Segments created 746, maxWait 45ms, bed comp in use: none, height map offset 0.000, hiccups added 65/0 (0.00ms), max steps late 0, ebfmin 0.00, ebfmax 0.00
Pos req/act/dcf: 67028.00/66704/0.74 63402.00/63796/-0.93 68665.00/68591/-0.77
next step interrupt due in 68 ticks, disabled
Driver 0: stalled, SG min 0
Driver 1: ok, SG min 0
Driver 2: ok, SG min 0
Driver 3: ok, SG min 0
Driver 4: standstill, SG min n/a
Driver 5: 
Driver 6: 
Driver 7: 
Driver 8: 
Driver 9: 
Driver 10: 
Driver 11: 
=== DDARing 0 ===
Scheduled moves 3130, completed 3091, LaErrors 0, Underruns [0, 0, 0]
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
Heater 0 is on, I-accum = 0.2
Heater 1 is on, I-accum = 0.2
=== GCodes ===
Movement locks held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 3
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Q0 segments left 0
Code queue 0 is empty
=== Network ===
Slowest loop: 22.00ms; fastest: 0.07ms
Responder states: HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
HTTP sessions: 1 of 8
=== WiFi ===
Interface state: active
Module is connected to access point 
Failed messages: pending 0, notrdy 0, noresp 0
Firmware version 2.2.0
MAC address 5c:cf:7f:2c:25:00
Module reset reason: Turned on by main processor, Vcc 3.40, flash size 4194304, free heap 40844
WiFi IP address 192.168.1.61
Signal strength -46dBm, channel 6, mode 802.11n, reconnections 0
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0

balajiramani

@dc42 were you able to take a look at this? I built the latest dev release and I still the same issue.

dc42

@balajiramani I am aware of issues with some move speeds not being correct in 3.6 beta releases, and this may explain the noises. Please try beta 3 when it is released. I may also make an unofficial build available before beta 3 for the community to try.

balajiramani

@dc42 Thank you for the update. I will wait for the next release.